Add different background on same page

You could try making a background image and attach it to the body tag with some custom css.
https://www.w3schools.com/cssref/pr_background-image.asp
A simple image like you describe could be small so as not to increase page load time too much, then get the brower to expand the size to 100% (of body tag size) with:
https://www.w3schools.com/cssref/css3_pr_background-size.asp

Thanks for the reply sir
But i found the easy way , just add the background color to visual editor ??

Or you could create 2 div’s in HTML and then put the css code and it would worked also ??